My iphone only gives sound through the left speakers only and reading this forum I'm told it maybe the cable. It would be a huge problem to take my car dash apart again to install a new cable so I was wondering if anyone ever use this IpBus cable before http://www.amazon.com/Ipod%C2%AE-3-5MM- ... 851&sr=8-5 . It would be much easier to install as I have an XM module I can connect it to with easy access.

I experienced something similar - try putting balance 100% to the quiet side and turn up the volume.

When I had this behavior, there would be like 60% noise, 40% music. I took the dash apart (you'll have to if you're putting in a new cable anyway) and checked all the wires, which hadn't come undone at all. I put good separation between the iPod wires and everything else. It sounded fine. I put it back together, making sure that no power wires were running close to the iPod cable, and it's been great ever since.